Table <tr> space not change [duplicate] - html

Question

This question already has answers here:
How to add a margin to a table row <tr> [duplicate]
(18 answers)
Closed 5 years ago.
I try to put small space in table <tr> but I can't do it, I try to do that, but not change it, how can I fix it? To understand about my question look at this image:
.panel-booking .panel-body {
padding: 0px;
height: 100px;
}
.panel-booking {
top:-60px; position:relative;
}
.tab-tb2 .nav-tabs li a {border-left: 1px solid #bfc1c3;height: 25px;}
#line-booking hr{margin-top: -45px; margin-left: 1px; width: 408px;color: #f00;
background-color: #ececec;
height: 1px;}
.booking-left-btn tr {line-height:30px;}
.booking-left-btn table, th, td {
}
.booking-left-btn th, td {
padding: 5px;
text-align: left;
}
.booking-left-btn .btn {
display: inline-block;
padding: 12px 7px;
margin-bottom: 21px;
font-size: 14px;
margin-left: -15px;
font-weight: normal;
line-height: 1.42857143;
text-align: center;
white-space: nowrap;
background-color: none;
vertical-align: middle;
-ms-touch-action: manipulation;
touch-action: manipulation;
cursor: pointer;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
background-image: none;
border: 1px solid #bdc4cb;
border-radius: 10px;
}
.booking-left-btn .room-detials {
text-align: center;
margin-left: -2px; color: #53585f;
}
.booking-left-btn .room-number {
text-align: center;
font-size: 15px;
color: #444444;
}
.booking-left-btn .panel-default {
border-color: #ddd;
height: 67px;
-moz-border-radius: 12px;
-webkit-border-radius: 12px;
-ie-border-radius: 12px;
-opera-border-radius: 12px;
-chrome-border-radius: 12px;
border-radius: 11px;
overflow: hidden;
width: 329px;
margin-left: -5px;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<div class="panel-booking">
<div class="booking-left-btn" style="margin-left:25px;">
<table style="width:100%">
<tr>
<td><button type="button" class="btn btn-default"> <div class="room-detials">Room</div>
<div class="room-number">1</div></button></td>
<td> <div class="panel panel-default">
<div class="panel-heading">Mahesh H</div>
<div class="panel-body">Panel Content</div>
</div></td>
</tr>
<tr>
<td > <button type="button" class="btn btn-default"> <div class="room-detials">Room</div>
<div class="room-number">1</div></button></td>
<td> <div class="panel panel-default">
<div class="panel-heading">Panel with panel-default class</div>
<div class="panel-body">Panel Content</div>
</div></td>
</tr>
<tr>
<td > <button type="button" class="btn btn-default"> <div class="room-detials">Room</div>
<div class="room-number">1</div></button></td>
<td> <div class="panel panel-default">
<div class="panel-heading">Panel with panel-default class</div>
<div class="panel-body">Panel Content</div>
</div></td>
</tr>
<tr>
<td > <button type="button" class="btn btn-default"> <div class="room-detials">Room</div>
<div class="room-number">1</div></button></td>
<td> <div class="panel panel-default">
<div class="panel-heading">Panel with panel-default class</div>
<div class="panel-body">Panel Content</div>
</div></td>
</tr>
<tr>
<td > <button type="button" class="btn btn-default"> <div class="room-detials">Room</div>
<div class="room-number">1</div></button></td>
<td> <div class="panel panel-default">
<div class="panel-heading">Panel with panel-default class</div>
<div class="panel-body">Panel Content</div>
</div></td>
</tr>
<tr>
<td > <button type="button" class="btn btn-default"> <div class="room-detials">Room</div>
<div class="room-number">1</div></button></td>
<td> <div class="panel panel-default">
<div class="panel-heading">Panel with panel-default class</div>
<div class="panel-body">Panel Content</div>
</div></td>
</tr>
</table>
</div>
</div>

Answer 1

can you try using This can be used as trick

Answer 2

Use
<div class="panel-body"> Panel Content</div>
If in between table then use cellspacing="20" in your table tag